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您的检索式：作者名="Zebang ZHENG"
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| 1 | Electron force-induced dislocations annihilation and regeneration of a superalloy through electrical in-situ transmission electron microscopy observations显示文摘What effect does electric current do on dislocation evolution of metals keeps being a confusing question to be answered and proved. To this end, the dislocation evolution of a superalloy with electric current was directly observed by electrical in-situ transmission electron microscopy in this work. Dislocations annihilation at first and then regeneration was found for the first time, which directly proves the existence of electron force during the electrically-assisted manufacturing. Dislocations regeneration would be driven by the electron force and the resistance softening by the local Joule heating effect. Resultantly,a base could be provided for future electrically-assisted research. | Xina Zhang Hongwei Li Mei Zhan Zebang Zheng Jia Gao Guangda Shao | 2020 | Journal of Materials Science & Technology2020，36，1： | 12 |
| 2 | A constitutive model coupling damage and material anisotropy for wide stress triaxiality显示文摘A constitutive model that can describe the damage evolution of anisotropic metal sheets during the complex forming processes which experience wide stress triaxiality history is essential to accurately predict the deformation and rupture behaviors of the processes.In this study,a modified Lemaitre damage criterion which couples with the anisotropic Barlat 89 yield function is established.The effects of stress triaxiality,Lode parameter and shear stress on damage accumulation are considered in the constitutive model.The model is numerically implemented and applied to fracture prediction in tensile tests with different stress triaxialities and a complex deformation process with wide stress triaxiality history.The good consistency of predictions and experiments indicates that the modified Lemaitre damage model has excellent fracture prediction ability.Finally,the accuracy of the model is analyzed and discussed. | Rui LI Mei ZHAN Zebang ZHENG Hongrui ZHANG Xiaolei CUI Wei LV Yudong LEI | 2020 | Chinese Journal of Aeronautics2020，33，12： | 7 |
| 3 | Investigation on the Solidification and Phase Transformation in Pb-Free Solders Using In Situ Synchrotron Radiography and Diffraction:A Review显示文摘It is widely accepted that further development of Pb-free solder alloys for improved processing and in-service properties of next-generation electronics,can be accelerated through a fundamental understanding of phase transformation and microstructure control in Pb-free solder joints.Advanced characterization techniques including synchrotron radiation provide a comprehensive toolset to measure the composition,crystallography,morphology,and properties of the major components of solder alloys.The research using such techniques is reviewed in detail including the characterization of the eff ects of microalloy additions on the microstructure and properties of Pb-free solder joints,especially those on the intermetallic phases.The discoveries outlined are of scientific and industrial relevance and have implications for new solder alloy composition design and the reliability of lead-free solder joints. | Guang Zeng Shiqian Liu Qinfen Gu Zebang Zheng Hideyuki Yasuda Stuart D.McDonald Kazuhiro Nogita | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，1： | 0 |
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